PCV-20 vaccination for adults during a short febrile illness
Official title: Immunogenicity and Safety of the 20-Valent Pneumococcal Conjugate Vaccine (PCV-20) Administered During an Acute Febrile Illness in Adults: a Multicentric Randomized Non-inferiority Trial
Run by Centre Hospitalier Universitaire de Saint Etienne · NCT06822907 · Data updated 2026-11-12
This test sees if giving the PCV-20 pneumococcal vaccine to adults hospitalized with a short, non-severe fever produces the same immune response and safety as giving it after the fever has resolved.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 85 Years |
| Sex | All |
| Enrollment | 1052 (estimated) |
| Sponsor | Centre Hospitalier Universitaire de Saint Etienne Academic / other |
| Drugs / interventions | Rituximab, chemotherapy |
| Locations | 24 sites (Saint-Etienne, France and 23 other locations) |
| Status | Recruiting |
| Started | December 17, 2025 |
| Main results expected | October 1, 2028 |
| Study ends | October 1, 2028 |
| Registry record updated | March 30, 2026 |
| Trial ID | NCT06822907 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults hospitalized for more than 24 hours with a recent measured fever (≥38°C) and at least one medium- or high-risk comorbidity for invasive pneumococcal disease are the intended participants.
✕Probably not a fit
People with severe or unstable acute illness, those requiring intensive care, or individuals with contraindications to PCV-20 are unlikely to benefit from this approach.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
In this randomized Phase 4 trial, adults at increased risk for invasive pneumococcal disease who are hospitalized with a recent non-severe fever are assigned to receive PCV-20 either during the febrile episode (early) or after recovery (delayed). Antibody levels are measured and participants are monitored for vaccine-related adverse events to compare immune response and safety between the two timing strategies. The primary goal is to test non-inferiority of immune responses when vaccination occurs during a transient febrile illness versus delayed vaccination. The trial is conducted at university and regional hospitals in France and enrolls adults with specified comorbidities who have been hospitalized for more than 24 hours.
Why it matters
Potential benefit: If successful, it could allow safe vaccination during short febrile illnesses and reduce missed opportunities to protect at-risk adults from pneumococcal disease.
How similar studies have gone: Pediatric studies show no safety or efficacy concerns when vaccinating during fever, but adult data are limited, so this approach is relatively untested in adults.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion criteria : * History of body temperature ≥ 38°C measured at least twice prior to randomization (Randomization must be performed as soon as possible on a febrile patient or 72 hours after apyrexia at the latest) * Having at least one comorbidity that defines patients as medium or high risk for pneumococcal invasive infection: * Medium risk: Cyanogenic congenital heart disease; chronic heart failure; chronic respiratory failure; chronic obstructive pulmonary disease; emphysema; severe asthma under chronic treatment; chronic renal failure; chronic liver disease; diabetes mellitus treated; Osteo-meningeal leak or cochlear implant; Age \> 65 years old. * High risk : Hypo or asplenic people; hereditary immunodeficiency syndromes; people living with HIV; solid organ transplanted; People under immunosuppressors (corticosteroids, biotherapy) for an auto-immune or an inflammatory chronic disease; patients with nephrotic syndrome * Hospitalization for \> 24 hours long * Social security affiliation * Signed informed consent Exclusion criteria : * Patient unable to give informed consent * Curators, wardship * History of previous vaccination with PCV-7 or PCV-13 or PCV-20 * History of PPV-23 in the previous year * Patient having received another vaccination within one month prior to inclusion or planning another vaccination in the month after inclusion except for Influenza vaccine. * Patient with history of bone marrow transplantation * Patient with haematological malignancies * Patient under chemotherapy for solid tumor or with a history of chemotherapy in the past three months * Patient treated with Rituximab currently or in the past 6 months * Patient with Sequential Organ Failure Assessment (qSOFA ) score ≥ 2 at randomization (acute severe febrile illness) * Patient hospitalized in an Intensive Care Unit * Pregnancy * Breastfeeding woman * Recipients of polyclonal gammaglobulins in the past three months * Inability to follow the protocol * Bleeding disorder contra-indicating intramuscular injection according to the investigator * History of allergy to PCV-20 or vaccine-related components. * S. pneumoniae infection with laboratory confirmation (blood culture, culture from a sterile site, urinary or Cerebrospinal fluid antigens, sputum culture with \> 10\^7 colony forming unit (CFU)/mL) being the cause of the current hospitalization
Where it's running
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CHU de Saint-Etienne
Saint-Etienne, France, France Recruiting -
Centre Hospitalier
Annecy, France Not yet recruiting -
Centre Hospitalier Universitaire
Besançon, France Not yet recruiting -
Centre Hospitalier
Bordeaux, France Not yet recruiting -
Centre Hospitalier Universitaire
Brest, France Not yet recruiting -
Centre Hospitalier
Brest, France Not yet recruiting
Show 18 more locations
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Centre Hospitalier General Metropole Savoie
Chambéry, France Not yet recruiting -
Centre Hospitalier de Creteil
Créteil, France Not yet recruiting -
Centre Hospitalier Universitaire
Dijon, France Not yet recruiting -
Centre Hospitalier Universitaire
Grenoble, France Not yet recruiting -
Centre Hospitalier
La Roche-sur-Yon, France Not yet recruiting -
Centre Hospitalier General
Le Mans, France Not yet recruiting -
Centre Hospitalier
Le Puy-en-Velay, France Not yet recruiting -
Centre Hospitalier Universitaire
Lille, France Not yet recruiting -
Hospices Civils de Lyon
Lyon, France Not yet recruiting -
Centre Hospitalier Regional Universitaire
Montpellier, France Not yet recruiting -
Centre Hospitalier Universitaire
Nancy, France Not yet recruiting -
Centre Hospitalier Universitaire
Nantes, France Not yet recruiting -
Centre Hospitalier Universitaire
Nice, France Not yet recruiting -
Centre Hospitalier Universitaire
Nîmes, France Not yet recruiting -
Centre Hospitalier Bichat
Paris, France Not yet recruiting -
Assistance Publique Hopitaux de Paris
Paris, France Not yet recruiting -
Centre Hospitalier Universitaire
Rennes, France Not yet recruiting -
Centre Hospitalier Universitaire
Rouen, France Not yet recruiting
Study contacts
- Principal investigator: Elisabeth BOTELHO-NEVERS, MD PhD — Centre Hospitalier Universitaire de Saint Etienne
- Study coordinator: Elisabeth BOTELHO-NEVERS, MD PhD
- Email: Elisabeth.Botelho-Nevers@chu-st-etienne.fr
- Phone: (0)477829234
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Nasal immune responses in older adults with pneumococcal or viral respiratory infections
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Identifying pathogens in febrile patients using gene expression
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Evaluating the impact of pneumococcal vaccination on invasive infections in children
This study is trying to see how well the pneumococcal vaccines are working to protect children from serious infections caused by pneumococcus.
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Understanding causes and outcomes of febrile illness in rural South and Southeast Asia
This study is trying to find out what causes fevers and how they affect people living in rural areas of Laos, Myanmar, Thailand, and Bangladesh to help improve health care in those communities.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.